carve out ALL signs of mold, any darkening, bruised looking areas around it and throw it far away from the garden.
use clean utensils so it isn’t spread, alcohol will clean the scissors.
the mold spreads when it’s dry, careful of the that, have a bag to toss the moldy stuff in.
look for the mold daily, catch it small, don’t let it spread.
Here’s a short read on another idea